JP2004500518A - Bearing units with improved anti-fretting behavior, especially for railway axle boxes - Google Patents

Bearing units with improved anti-fretting behavior, especially for railway axle boxes Download PDF

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Publication number
JP2004500518A
JP2004500518A JP2000537750A JP2000537750A JP2004500518A JP 2004500518 A JP2004500518 A JP 2004500518A JP 2000537750 A JP2000537750 A JP 2000537750A JP 2000537750 A JP2000537750 A JP 2000537750A JP 2004500518 A JP2004500518 A JP 2004500518A
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bearing unit
ring
unit according
inner ring
wheel
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JP4338116B2 (en
Inventor
スキラー，ジョン，ビンセント
タディク，ベドラン
デフォゼッツ，マレ
ベルトレーリ，ダリオ
マルティネッティ，マウリツィオ
ロリイ，エンリコ
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SKF Engineering and Research Centre BV
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SKF Engineering and Research Centre BV
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/02—Axle-boxes with journal bearings
    • B61F15/04—Axle-boxes with journal bearings for locomotives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/12—Axle-boxes with roller, needle, or ball bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6618—Retaining the grease in or near the bearing in a reservoir in the sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Abstract

軸受ユニットは、内輪手段（１２、１３）および外輪手段（６）を有する複列円錐ころ軸受（１）を含み、前記内輪手段は、二つの対向する取付面（７、１０）の間の車軸スタブ（５）に嵌合されており、前記取付面の少なくとも一つと内輪手段の間に、フレッチング腐蝕を防止するための手段が設けられている。少なくとも一つの取付面と内輪手段は、重合体支持輪（１９）により、互いに他に係合する。本軸受ユニットは、鉄道用車軸箱の軸受ユニットとして使用可能である。
【選択図】図１１The bearing unit comprises a double row tapered roller bearing (1) having inner ring means (12,13) and outer ring means (6), said inner ring means being an axle between two opposing mounting surfaces (7,10). A means for preventing fretting corrosion is provided between at least one of the mounting surfaces and the inner ring means, which is fitted to the stub (5). The at least one mounting surface and the inner ring means are mutually engaged by a polymer support ring (19). The present bearing unit can be used as a bearing unit for a railway axle box.
[Selection diagram] FIG.

Description

【０００１】
本発明は、内輪手段および外輪手段を有する転がり軸受を含み、前記内輪手段は、二つの対向する取付面の間の車軸スタブに嵌合されており、前記取付面の少なくとも一つと内輪手段の間に、フレッチング腐蝕を防止するための手段が設けられている軸受ユニットに関する。
【０００２】
この種の鉄道用車軸箱軸受ユニットは、ＪＰ−Ａ−９７２３４４以来、既知である。前記ユニットは、肩部とバックアップ輪の間に介在層を有しており、これは、前記部品の材料より柔らかい。介在層の目的は、フレッチング腐蝕の低減であるが、これは、一般に、列車軸受ユニットの使用中に生ずる変動荷重が原因である。
【０００３】
問題の層は、バックアップ輪に接着またはメッキしてよい。しかし、それには、特殊なバックアップ輪の製造が必要であり、したがって、このリングの使用の変通性は、限定される。
【０００４】
本発明の目的は、汎用性がより高い軸受ユニットにフレッチング腐蝕防止手段を設けることである。この目的は、少なくとも一つの取付面と内輪手段が、非金属の支持輪、望ましくは、重合体支持輪により、互いに他に係合することにより、成し遂げられる。
【０００５】
本発明による非金属の支持輪は、別個のエンジニアリングピースを構成しており、これは、問題の列車用軸受ユニットの標準部品、例えば、標準のバックアップ輪と併用可能である。
【０００６】
非金属の支持輪は、いくつかのやり方で適用してよい。一般に、内輪手段は、スタブの肩部と前記スタブにボルト止めされるエンドブラケットの間に嵌合され、前記内輪手段は、バックアップ輪により、該肩部に係合する。本発明によれば、バックアップ輪は、非金属の支持輪により、内輪手段に係合する。
【０００７】
さらに、内輪手段は、非金属の支持輪により、エンドブラケットに直接係合してよい。
【０００８】
また、内輪手段は、圧力輪により、エンドブラケットに間接的に係合してよく、前記圧力輪は、非金属の支持輪により、内輪手段に係合してよい。
【０００９】
軸受ユニット、特に、鉄道用車軸箱の軸受ユニットは、間隔輪を囲む二つの内輪を含む内輪手段を設けてよい。別の可能性によれば、前記リングは、非金属の支持輪により、内輪のうちの少なくとも一つに係合してよい。
【００１０】
支持輪は、別個のピースであるため、追加の機能を果たしてよい。例えば、支持輪は、ラビリンスリング部品を含んで、外輪に接続された別のラビリンスシール部品とラビリンスシールを形成してよい。
【００１１】
支持輪は、所要の封止機能を果たすよう、いかなる所望の形状を付与してもよい。また、軟質ゴム封止リップをラビリンスシールに成形して、内部軸受空間の気密度を完全にしてよい。
【００１２】
さらに、支持輪は、軸受の回転を検知するためのセンサー手段を含んでよい。前記センサーは、例えば、問題の車軸の温度、振動、回転数等を監視するのに使用してよい。
【００１３】
また、支持輪は、列車用軸受ユニットの長期潤滑を保証するため、グリース溜めとして使用してよい。
【００１４】
支持輪は、いくつかのやり方で固定してよく、例えば、締め付けにより予め取り付けてよい。この場合、支持輪と内輪手段は、溝・リブ接続により、互いに他に係合する。
【００１５】
さらに、支持輪は、バックアップ輪に、あるいは圧力輪に接続してよい。また、支持輪は、間隔輪に接続してよい。
【００１６】
支持輪は、いくつかのやり方で接続してよい。望ましくは、支持輪は、軸方向の延長部を含み、これは、内輪のあるいはバックアップ輪のくぼみに係合する。
【 ００１７】
くぼみは、アンダーカット溝を含んでよく、また、軸方向延長部は、アンダーカット溝にスナップ嵌めされる舌部を含んでよい。
【００１８】
さらに、支持輪は、内輪手段のくぼみに嵌まる管状延長部を有してよい。
【００１９】
本発明による軸受ユニットは、特に、鉄道用車軸箱の軸受ユニットに適している。この用途においては、鉄道用車輪と車輪箱の間の部域は、大きな荷重を受ける。使用中、曲げおよび半径方向の変位が生じ、その結果、内輪と鉄道用車輪の間に、対応する曲げおよび半径方向の運動が生じ、軌道運動が生じる。
【００２０】
さらに、この部域に、フレッチング誘導の腐蝕が生じる場合がある。
【００２１】
本発明によれば、これらの悪影響は、非金属の支持輪、特に、重合体の支持輪により、回避される。
【００２２】
軸受は、複列円筒または複列円錐ころ軸受でよい。また、玉軸受を使用してよい。
【００２３】
以下、図に示したいくつかの実施例を参照して、本発明をさらに説明する。
【００２４】
図１は、本発明による列車用軸受ユニットを、列車用車輪および車軸の一部と共に示す。
【００２５】
図２は、図１の拡大詳細図である。
【００２６】
図３〜１１は、列車用軸受ユニットの別の実施例を示す。
【００２７】
図１に示した列車用軸受ユニットは、車軸３の車軸スタブ２に嵌合された複列円錐ころ軸受１を含む。車軸３は、鉄道用車輪４も保持している。車軸３の他端には、複列円錐ころ軸受を有する同様の車軸スタブ、および鉄道用車輪が、取り付けられている。
【００２８】
複列円錐ころ軸受１は、車軸スタブ２にプレス嵌めされた内輪手段５、および鉄道用ボギー（図示せず）内の車軸箱の支持体に嵌合された外輪手段６を有している。
【００２９】
車軸スタブは、肩部７を有し、これは、バックアップ輪８により、内輪手段５に係合する。他端では、内輪手段５は、圧力輪９に係合し、これは、今度は、エンドキャップ１０およびボルト１１により、車軸スタブ２上の適所に維持される。
【００３０】
内輪手段５、バックアップ輪８および圧力輪９は、ボルト１１により、所要の軸方向圧縮力下に保持可能である。
【００３１】
図示の実施例における内輪手段５は、二つの内輪１２、１３から成り、これらは、間隔輪１４により、相互に支持されている。内輪１２、１３のそれぞれは、テーパ付き軌道を含む。
【００３２】
外輪手段６は、単一リングから成り、二つのテーパ付き軌道を有している。内輪１２、１３の軌道と外輪６の間には、２列の転動体１５、１６が、収容されている。これら列は、ケージ１７、１８により、離ればなれに保持されている。
【００３３】
外輪手段６は、鉄道用ボギーの（図示しない）車軸支持体に回動不能に保持されており、一方、内輪手段５は、車軸３と共に回動する。
【００３４】
車軸３は、車軸箱に対する鉄道車両上部構造の重量により、荷重を受ける。それにより、一方では、鉄道用車輪４に、また、他方では、車軸スタブ２に作用する力から生ずる垂直平面内の偶力が、発生し、内輪手段５、バックアップ輪８および圧力輪９が受ける圧縮力にバラツキが生じることになる。これらの変動の結果として、圧縮力および剪断応力のバラツキが生じ、通常、フレッチングが生ずるが、これは、列車用軸受ユニットの正常な機能にとって有害である。
【００３５】
この点、最も脆弱な部域は、内輪手段５の内輪１２とバックアップ輪８の接触面により構成される。したがって、本発明によれば、重合体支持輪１９が、これら要素の間に配置される。前記重合体支持輪は、内輪１２およびバックアップ輪８の対向面にフレッチング腐蝕が生ずるのを防ぐ。
【００３６】
さらに、このような重合体輪５０は、内輪１３と圧力輪９の間にも取り付けてよい。この場合も、ラビリンスシール部５２が設けられ、これは、隣接ラビリンスシール部２１と共に、外輪手段６に接続されて、ラビリンスシール５４を形成する。
【００３７】
図２の拡大図においては、この重合体支持輪は、拡大尺度で示してある。
【００３８】
さらに、本発明による重合体支持輪１９は、追加の機能を果たしてよい。図２の実施例においては、重合体支持輪１９は、ラビリンスシール部２０を有し、これは、隣接ラビリンスシール部２１と共に、外輪手段６に接続されて、ラビリンスシール２２を形成する。
【００３９】
図３の実施例は、シール２３に対する別の実施例を示す。このシール２３は、重合体支持輪２４と一体化された第１のシール部２５、および外輪手段６に接続された第２のシール部２６を含む。シール部２５、２６は、Ｓ形の間隙を囲み、さらに、シール部２６は、封止作用の向上のため、シール部２５の平らな表面２９に向かって伸長するリップ２８を有している。
【００４０】
バックアップ輪８も、ラビリンス部３０を有し、これは、ラビリンス部３１と共に、ラビリンスシールを形成する。
【００４１】
図４の実施例は、シール３６を示し、これは、重合体バックアップ輪３２の脚３７の表面３５、外輪手段６に接続された封止輪３３、および可撓シール３４により構成されている。可撓シール３４は、脚３７の表面３５に係合し、それにより、外輪手段６と内輪手段５の間の軸受空間の完全な封止が得られる。
【００４２】
図５の実施例は、リブ３９を有する重合体バックアップ輪３８を含み、これは、内輪１２の端面におけるスリット４０に係合する。したがって、重合体支持輪は、内輪１２に確実に締め付けられる。
【００４３】
外輪６には、封止輪４１が取り付けられており、該封止輪４１は、外方に突出している隆起部４３を含むフィンガー４２を有しており、これは、外輪６の内部溝４４に係合する。
それにより、封止輪４１も、外輪手段６に確実に締め付けられる。
【００４４】
封止輪４１は、リブまたはフィンガー４６を有する内部空間４５に境界を設けるよう形成されている。この空間内では、ある量のグリースが存在してよい。
【００４５】
図６は、また別の実施例を示し、この場合は、重合体支持輪５０は、内輪１２と間隔輪１４の間に取り付けられている。前記間隔輪の他方の側（図示せず）では、同様の支持輪を、同様に配置してよい。
【００４６】
図７に示した実施例は、支持輪６０を含み、これは、半径方向の延長部６１を有し、その舌部６４は、くぼみ６２のアンダーカット溝部６３にスナップ嵌めされる。前記支持輪は、このようにして、内輪１２に接続される。
【００４７】
図８の実施例における支持輪８０は、バックアップ輪８に接続される。この目的で、支持輪８０は、半径方向の延長部８１を有し、これは、その舌部８４により、くぼみ８２のアンダーカット溝部８３にスナップ嵌めされる。
【００４８】
図９の実施例の支持輪８０は、バックアップ輪８に、後者の内周において、接続される。これもまた、半径方向の延長部７１の舌部７４を、くぼみ７２のアンダーカット溝部７３にスナップ嵌めして、成し遂げられる。
【００４９】
図１０の実施例では、バックアップ輪８および内輪１２は、支持輪９０を介して相互に接続されており、これは、二つの対向する半径方向延長部７１、９１を有している。結果として、軸受は、バックアップ輪および支持輪と共に、一体として取り扱うことができ、これは、保存、取扱い、および設置に関わる利点を有する。
【００５０】
図１１に示したように、内輪の半分１２と間隔輪１４の間の支持輪１００も、半径方向の延長部１０１により、接続可能である。[0001]
The invention includes a rolling bearing having an inner ring means and an outer ring means, wherein the inner ring means is fitted on an axle stub between two opposing mounting surfaces, and between at least one of the mounting surfaces and the inner ring means. And a bearing unit provided with a means for preventing fretting corrosion.
[0002]
A railway axle box bearing unit of this kind has been known since JP-A-972344. The unit has an intervening layer between the shoulder and the backup wheel, which is softer than the material of the part. The purpose of the intervening layer is to reduce fretting corrosion, which is generally due to fluctuating loads that occur during use of the train bearing unit.
[0003]
The layer in question may be glued or plated on the backup wheel. However, this requires the manufacture of special backup wheels, and thus the versatility of use of this ring is limited.
[0004]
An object of the present invention is to provide a fretting corrosion preventing means in a bearing unit having higher versatility. This object is achieved by the at least one mounting surface and the inner ring means being mutually engaged by a non-metallic support ring, preferably a polymer support ring.
[0005]
The non-metallic support wheel according to the invention constitutes a separate engineering piece, which can be used in conjunction with standard components of the train bearing unit in question, for example a standard backup wheel.
[0006]
A non-metallic support wheel may be applied in several ways. Generally, the inner ring means is fitted between the shoulder of the stub and the end bracket bolted to the stub, and the inner ring means is engaged with the shoulder by a backup wheel. According to the invention, the backup wheel engages the inner wheel means by means of a non-metallic support wheel.
[0007]
Further, the inner ring means may be directly engaged with the end bracket by a non-metallic support ring.
[0008]
The inner ring means may be indirectly engaged with the end bracket by a pressure wheel, and the pressure ring may be engaged with the inner ring means by a non-metallic support ring.
[0009]
The bearing unit, in particular the bearing unit of a railway axle box, may be provided with inner ring means including two inner rings surrounding the spacing ring. According to another possibility, the ring may engage at least one of the inner rings by means of a non-metallic support ring.
[0010]
The support wheel may serve an additional function since it is a separate piece. For example, the support wheel may include a labyrinth ring component to form a labyrinth seal with another labyrinth seal component connected to the outer race.
[0011]
The support wheel may have any desired shape to perform the required sealing function. Further, a soft rubber sealing lip may be formed into a labyrinth seal to complete the airtightness of the internal bearing space.
[0012]
Further, the support wheel may include sensor means for detecting rotation of the bearing. The sensors may be used, for example, to monitor the temperature, vibration, speed, etc. of the axle in question.
[0013]
The support wheels may also be used as grease reservoirs to ensure long-term lubrication of the train bearing unit.
[0014]
The support wheel may be fixed in several ways, for example, may be pre-mounted by tightening. In this case, the support ring and the inner ring means are engaged with each other by the groove / rib connection.
[0015]
Further, the support wheel may be connected to a backup wheel or to a pressure wheel. Further, the support wheel may be connected to the spacing wheel.
[0016]
The support wheels may be connected in several ways. Desirably, the support wheel includes an axial extension that engages a recess in the inner or backup wheel.
[0017]
The recess may include an undercut groove, and the axial extension may include a tongue that snaps into the undercut groove.
[0018]
In addition, the support ring may have a tubular extension that fits into the recess of the inner ring means.
[0019]
The bearing unit according to the invention is particularly suitable for bearing units for railway axle boxes. In this application, the area between the railway wheels and the wheel box is subjected to large loads. In use, bending and radial displacements occur, resulting in corresponding bending and radial movements between the inner ring and the railway wheels, and orbital movements.
[0020]
In addition, fretting-induced corrosion may occur in this area.
[0021]
According to the invention, these adverse effects are avoided by non-metallic support wheels, in particular by polymer support wheels.
[0022]
The bearing may be a double row cylindrical or double row tapered roller bearing. Also, ball bearings may be used.
[0023]
Hereinafter, the present invention will be further described with reference to some embodiments shown in the drawings.
[0024]
FIG. 1 shows a train bearing unit according to the invention together with a part of a train wheel and axle.
[0025]
FIG. 2 is an enlarged detail view of FIG.
[0026]
3 to 11 show another embodiment of the train bearing unit.
[0027]
The train bearing unit shown in FIG. 1 includes a double row tapered roller bearing 1 fitted to an axle stub 2 of an axle 3. The axle 3 also holds the railway wheels 4. At the other end of the axle 3, a similar axle stub with double row tapered roller bearings and railway wheels are mounted.
[0028]
Double row tapered roller bearing 1 has inner ring means 5 press-fitted to axle stub 2 and outer ring means 6 fitted to the axle box support in a railway bogie (not shown).
[0029]
The axle stub has a shoulder 7 which engages the inner ring means 5 by means of a backup wheel 8. At the other end, the inner ring means 5 engages a pressure wheel 9, which in turn is held in place on the axle stub 2 by end caps 10 and bolts 11.
[0030]
The inner ring means 5, the backup wheel 8 and the pressure wheel 9 can be held by a bolt 11 under a required axial compression force.
[0031]
The inner ring means 5 in the embodiment shown comprises two inner rings 12, 13, which are mutually supported by a spacing ring. Each of the inner rings 12, 13 includes a tapered track.
[0032]
The outer ring means 6 consists of a single ring and has two tapered tracks. Two rows of rolling elements 15 and 16 are accommodated between the tracks of the inner rings 12 and 13 and the outer ring 6. These rows are held apart by cages 17,18.
[0033]
The outer ring means 6 is non-rotatably held by an axle support (not shown) of the railway bogie, while the inner ring means 5 rotates with the axle 3.
[0034]
The axle 3 receives a load due to the weight of the railcar superstructure relative to the axle box. Thereby, a couple in the vertical plane resulting from the forces acting on the rail wheels 4 on the one hand and on the axle stubs 2 on the other hand occurs and is received by the inner ring means 5, the backup wheel 8 and the pressure wheel 9. The compression force will vary. These fluctuations result in variations in compressive and shear stresses, usually resulting in fretting, which is detrimental to the normal functioning of the train bearing unit.
[0035]
In this regard, the weakest area is constituted by the contact surface between the inner ring 12 of the inner ring means 5 and the backup wheel 8. Thus, according to the invention, a polymer support wheel 19 is arranged between these elements. The polymer support wheel prevents fretting corrosion on the facing surfaces of the inner wheel 12 and the backup wheel 8.
[0036]
Further, such a polymer wheel 50 may be attached between the inner ring 13 and the pressure wheel 9. Again, a labyrinth seal 52 is provided, which, together with the adjacent labyrinth seal 21, is connected to the outer ring means 6 to form a labyrinth seal 54.
[0037]
In the enlarged view of FIG. 2, this polymer support wheel is shown on an enlarged scale.
[0038]
In addition, the polymer support wheel 19 according to the invention may serve additional functions. In the embodiment of FIG. 2, the polymer support ring 19 has a labyrinth seal 20 which, together with an adjacent labyrinth seal 21, is connected to the outer ring means 6 to form a labyrinth seal 22.
[0039]
The embodiment of FIG. 3 shows another embodiment for the seal 23. The seal 23 includes a first seal portion 25 integrated with the polymer support wheel 24 and a second seal portion 26 connected to the outer ring means 6. The seals 25, 26 surround the S-shaped gap, and the seal 26 has a lip 28 extending towards a flat surface 29 of the seal 25 for improved sealing.
[0040]
The backup wheel 8 also has a labyrinth part 30, which together with the labyrinth part 31, forms a labyrinth seal.
[0041]
The embodiment of FIG. 4 shows a seal 36, which is constituted by a surface 35 of the leg 37 of the polymer backup wheel 32, a sealing wheel 33 connected to the outer wheel means 6, and a flexible seal 34. The flexible seal 34 engages the surface 35 of the leg 37 so that a complete sealing of the bearing space between the outer ring means 6 and the inner ring means 5 is obtained.
[0042]
The embodiment of FIG. 5 includes a polymer backup wheel 38 having a rib 39 that engages a slit 40 in the end face of the inner ring 12. Therefore, the polymer support wheel is securely fastened to the inner ring 12.
[0043]
A sealing ring 41 is attached to the outer ring 6, and has a finger 42 including an outwardly projecting ridge 43, which is formed by an inner groove 44 of the outer ring 6. Engages.
Thereby, the sealing ring 41 is also securely fastened to the outer ring means 6.
[0044]
The sealing ring 41 is formed so as to provide a boundary in the internal space 45 having the ribs or fingers 46. In this space, a certain amount of grease may be present.
[0045]
FIG. 6 shows yet another embodiment, in which the polymer support ring 50 is mounted between the inner ring 12 and the spacing ring 14. On the other side (not shown) of the spacing wheel, similar support wheels may be similarly arranged.
[0046]
The embodiment shown in FIG. 7 includes a support wheel 60, which has a radial extension 61, the tongue 64 of which is snap-fit into an undercut groove 63 of a recess 62. The support wheel is thus connected to the inner ring 12.
[0047]
The support wheel 80 in the embodiment of FIG. 8 is connected to the backup wheel 8. For this purpose, the support wheel 80 has a radial extension 81 which is snapped by its tongue 84 into an undercut groove 83 of a recess 82.
[0048]
9 is connected to the backup wheel 8 on the inner periphery of the latter. This is also achieved by snap-fitting the tongue 74 of the radial extension 71 into the undercut groove 73 of the recess 72.
[0049]
In the embodiment of FIG. 10, the backup wheel 8 and the inner wheel 12 are interconnected via a support wheel 90, which has two opposing radial extensions 71,91. As a result, the bearing, together with the backup wheel and the support wheel, can be handled as one, which has advantages relating to storage, handling and installation.
[0050]
As shown in FIG. 11, the support wheel 100 between the inner ring half 12 and the spacing ring 14 can also be connected by a radial extension 101.

Claims (29)

内輪手段（５）および外輪手段（６）を有する転がり軸受（１）を含み、前記内輪手段（５）は、二つの対向する取付面の間の車軸スタブ（２）に嵌合されており、前記取付面の少なくとも一つと内輪手段（５）の間に、フレッチング腐蝕を防止するための手段が設けられている軸受ユニットにおいて、前記少なくとも一つの取付面と内輪手段（５）は、非金属の重合体支持輪（１９、２４、３２、３８、５０、５１）により、互いに他に係合することを特徴とする軸受ユニット。A rolling bearing (1) having an inner ring means (5) and an outer ring means (6), said inner ring means (5) being fitted on an axle stub (2) between two opposing mounting surfaces; In a bearing unit provided with means for preventing fretting corrosion between at least one of the mounting surfaces and the inner ring means (5), the at least one mounting surface and the inner ring means (5) may be made of a non-metallic material. A bearing unit characterized in that it is mutually engaged by a polymer support wheel (19, 24, 32, 38, 50, 51). 内輪手段（５）は、スタブ（２）の肩部（７）と前記スタブ（２）にボルト止めされるエンドブラケット（１０）の間に嵌合され、前記内輪手段（５）は、バックアップ輪（８）により、該肩部（７）に係合し、前記バックアップ輪（８）は、非金属の支持輪（１９、２４、３２、３８）により、内輪手段（３）に係合することとする請求項１に記載の軸受ユニット。The inner ring means (5) is fitted between a shoulder (7) of the stub (2) and an end bracket (10) bolted to the stub (2), and the inner ring means (5) is provided with a backup ring. (8) engages the shoulder (7), and the backup ring (8) engages the inner ring means (3) by a non-metallic support ring (19, 24, 32, 38). The bearing unit according to claim 1. 内輪手段（５）は、非金属の支持輪（５１）により、エンドブラケット（１０）に係合することとする請求項１または２に記載の軸受ユニット。The bearing unit according to claim 1 or 2, wherein the inner ring means (5) is engaged with the end bracket (10) by a non-metallic support ring (51). 内輪手段（５）は、圧力輪（１０）により、エンドブラケット（１０）に係合し、前記圧力輪（９）は、非金属の支持輪（５１）により、内輪手段（５）に係合することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The inner ring means (5) is engaged with the end bracket (10) by a pressure ring (10), and the pressure ring (9) is engaged with the inner ring means (5) by a non-metallic support ring (51). A bearing unit according to any one of the preceding claims. 内輪手段（５）は、間隔輪（１４）を囲む二つの内輪（１２、１３）を含み、前記間隔輪（１４）は、非金属の支持輪（５０）により、内輪のうちの少なくとも一つに係合することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The inner ring means (5) comprises two inner rings (12, 13) surrounding a spacing ring (14), said spacing ring (14) being at least one of the inner rings by a non-metallic supporting ring (50). The bearing unit according to any one of the preceding claims, wherein the bearing unit engages with the bearing unit. 非金属の支持輪（１９、２４、３２、３８）は、ラビリンスリング部品（２０、２３）を含んで、外輪手段（６）に接続された別のラビリンスシール部品（２１、２６）とラビリンスシール（２２、２３）を形成することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The non-metallic support ring (19, 24, 32, 38) includes a labyrinth ring part (20, 23) and another labyrinth seal part (21, 26) connected to the outer ring means (6). Bearing unit according to any one of the preceding claims, wherein (22,23) is formed. 支持輪（１９、２４、３２、３８）は、軸受の回転を検知するためのセンサー手段を含むこととする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support wheel (19, 24, 32, 38) comprises sensor means for detecting rotation of the bearing. 支持輪は、グリース溜め（４５）の境界を定めることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support wheel defines a grease reservoir (45). 支持輪（３８、６０、７０、９０）は、内輪手段（５）に接続されることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support ring (38, 60, 70, 90) is connected to the inner ring means (5). 支持輪（８０）は、バックアップ輪（８）に接続されることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support wheel (80) is connected to a backup wheel (8). 支持輪は、圧力輪（９）に接続されることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support wheel is connected to the pressure wheel (9). 支持輪は、間隔輪（１４）に接続されることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support ring is connected to the spacing ring (14). 支持輪（３８、６０、９０）は、軸方向の延長部（３９、６１、９１）を含み、これは、内輪（１２）のくぼみ（４０、６２、９２）に係合することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The support ring (38, 60, 90) includes an axial extension (39, 61, 91) which engages the recess (40, 62, 92) of the inner ring (12). The bearing unit according to claim 1. 支持輪（８０）は、半径方向の延長部（８１）を含み、これは、バックアップ輪（８）のくぼみ（８２）に係合することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The support wheel (80) includes a radial extension (81) which engages in the recess (82) of the backup wheel (8) according to any one of the preceding claims. The bearing unit as described. 支持輪は、半径方向の延長部を含み、これは、圧力輪のくぼみに係合することとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。Bearing unit according to any one of the preceding claims, wherein the support ring comprises a radial extension, which engages a depression in the pressure wheel. くぼみ（６２、７２、８２、９２）は、アンダーカット溝（６３、７３、８３、９３）を含み、また、軸方向延長部（６１、７１、８１、９１）は、アンダーカット溝（６３、７３、８３、９３）にスナップ嵌めされる舌部（６４、７４、８４、９４）を含むこととする請求項１３、１４または１５に記載の軸受ユニット。The recesses (62, 72, 82, 92) include undercut grooves (63, 73, 83, 93), and the axial extensions (61, 71, 81, 91) have undercut grooves (63, 73, 83, 93). A bearing unit according to claim 13, 14 or 15, characterized in that it comprises a tongue (64, 74, 84, 94) which is snap-fitted to (73, 83, 93). 支持輪（９０）は、二つの対向する軸方向延長部（７１、９１）を有しており、それらのうち一方は、内輪（１２）に係合し、また、それらのうち他方は、バックアップ輪（８）に係合することとする請求項１３乃至１６のうちのいずれか一つに記載の軸受ユニット。The support ring (90) has two opposing axial extensions (71, 91), one of which engages the inner ring (12) and the other of which is a backup. A bearing unit according to any one of claims 13 to 16, wherein the bearing unit engages with a ring (8). 支持輪は、二つの対向する軸方向延長部を有しており、それらのうち一方は、内輪に係合し、また、それらのうち他方は、圧力輪に係合することとする請求項１３乃至１７のうちのいずれか一つに記載の軸受ユニット。The support wheel has two opposing axial extensions, one of which engages the inner ring and the other of which engages the pressure wheel. 18. The bearing unit according to any one of items 17 to 17. 少なくとも一つのくぼみ（６２、８２、９２）は、内輪（１２）、バックアップ輪（８）および圧力輪（９）上に有ることとする請求項１３乃至１８のうちのいずれか一つに記載の軸受ユニット。19. The method as claimed in claim 13, wherein the at least one recess (62, 82, 92) is on the inner wheel (12), the backup wheel (8) and the pressure wheel (9). Bearing unit. 少なくとも一つのくぼみ（７２）は、内輪、バックアップ輪および圧力輪のうちの一つの外面上に有ることとする請求項１３乃至１９のうちのいずれか一つに記載の軸受ユニット。20. A bearing unit according to any one of claims 13 to 19, wherein at least one recess (72) is on the outer surface of one of the inner ring, backup ring and pressure ring. 少なくとも一つのくぼみ（４０、６２、７２、８２、９２）は、内輪、バックアップ輪および圧力輪のうちの一つの全円周に亘って伸長していることとする請求項１３乃至２０のうちのいずれか一つに記載の軸受ユニット。21. The method as claimed in claim 13, wherein at least one of the recesses (40, 62, 72, 82, 92) extends around the entire circumference of one of the inner ring, the backup ring and the pressure ring. The bearing unit according to any one of the above. 少なくとも一つの軸方向延長部（３９、６１、７１、８１、９１）は、支持輪の円周方向に連続していることとする請求項２１に記載の軸受ユニット。22. The bearing unit according to claim 21, wherein at least one axial extension (39, 61, 71, 81, 91) is continuous in the circumferential direction of the support wheel. 重合体の支持輪（３８）は、遷移等の補強材を含むこととする上記の請求項のうちのいずれか一つに記載の軸受ユニット。A bearing unit as claimed in any one of the preceding claims, wherein the polymeric support ring (38) includes a stiffener, such as a transition. 補強材は、繊維材料の編成、製織あるいは不織層であることとする請求項２３に記載の軸受ユニット。24. The bearing unit according to claim 23, wherein the reinforcing material is a knitted, woven or non-woven layer of a fiber material. 繊維は、ガラス繊維を含むこととする請求項２３または２４に記載の軸受ユニット。25. The bearing unit according to claim 23, wherein the fibers include glass fibers. 支持輪は、重合体の材料を含むこととする上記の請求項のうちのいずれか一つに記載の軸受ユニット。A bearing unit according to any one of the preceding claims, wherein the support wheel comprises a polymeric material. 支持輪は、樹脂材料を含むこととする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The bearing unit according to claim 1, wherein the support wheel includes a resin material. 軸受は、複列円錐ころ軸受であることとする上記の請求項のうちのいずれか一つに記載の軸受ユニット。The bearing unit according to any one of the preceding claims, wherein the bearing is a double row tapered roller bearing. 上記の請求項のうちのいずれか一つに記載の軸受ユニットを与えられ、該軸受ユニットは、内輪手段（５）および外輪手段（６）を有する転がり軸受（１）を含み、前記内輪手段（５）は、二つの対向する取付面の間の車軸スタブ（２）に嵌合されており、前記取付面の少なくとも一つと内輪手段（５）の間に、フレッチング腐蝕を防止するための手段が設けられている鉄道用車軸箱の軸受ユニットにおいて、前記少なくとも一つの取付面と内輪手段（５）は、非金属の支持輪（１９、２４、３２、３８、５０、５１）により、互いに他に係合することを特徴とする鉄道用車軸箱の軸受けユニット。Given a bearing unit according to any one of the preceding claims, the bearing unit comprises a rolling bearing (1) having an inner ring means (5) and an outer ring means (6), wherein the inner ring means ( 5) is fitted on an axle stub (2) between two opposing mounting surfaces, and means for preventing fretting corrosion are provided between at least one of said mounting surfaces and the inner ring means (5). In the provided rail axle box bearing unit, the at least one mounting surface and the inner ring means (5) are mutually separated by non-metallic support wheels (19, 24, 32, 38, 50, 51). A bearing unit for a railway axle box, wherein the bearing unit engages.
JP2000537750A 1998-03-23 1999-03-23 Bearing units with improved anti-fretting behavior, especially for railway axle box bearing units Expired - Lifetime JP4338116B2 (en)

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NL1008681A NL1008681C2 (en) 1998-03-23 1998-03-23 Train bearing unit with improved anti-frictional corrosion behavior.
PCT/NL1999/000161 WO1999048742A1 (en) 1998-03-23 1999-03-23 Bearing unit, in particular railway axlebox bearing unit, having improved anti-fretting behaviour

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KR100603223B1 (en) 2006-07-24
AU742290B2 (en) 2001-12-20
ZA200004986B (en) 2001-10-19
EP1064185A1 (en) 2001-01-03
EP1064185B1 (en) 2003-09-17
JP4338116B2 (en) 2009-10-07
CN1113769C (en) 2003-07-09
CN1297407A (en) 2001-05-30
WO1999048742A1 (en) 1999-09-30
DE69911385T2 (en) 2004-07-15
NL1008681C2 (en) 1999-09-24
KR20010034626A (en) 2001-04-25
US6561559B1 (en) 2003-05-13
AU3057799A (en) 1999-10-18
DE69911385D1 (en) 2003-10-23

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